-48.75% is the change from 521 to 267
Calculation steps:
[( 267 - 521 ) ÷ 521] x 100 = -48.75%
Formula
Percentage change = [(267 - 521) / 521] x 100
Subtract the new number by the original number
267 - 521 = -254
-254 ÷ 521 = -0.4875239923224568
-0.4875239923224568 x 100 = -48.75%